Page "Blitzkrieg" Paragraph 51

The German invasion of France, with subsidiary attacks on Belgium and the Netherlands, consisted of two phases, Operation Yellow ( Fall Gelb ) and Operation Red ( Fall Rot ).

Yellow opened with a feint conducted against the Netherlands and Belgium by two armoured corps and paratroopers.

The Germans had massed the bulk of their armoured force in Panzer Group von Kleist, which attacked through the comparatively unguarded sector of the Ardennes and achieved a breakthrough at the Battle of Sedan with air support.